Z-D-Glu(OBzl)-OH is a protected D-glutamic acid derivative used as a building block in peptide synthesis. The Z (benzyloxycarbonyl) group protects the α-amino group, the OBzl (benzyl ester) protects the γ-side chain carboxyl group, and the α-carboxyl group is free for selective peptide coupling. This prevents unwanted side reactions, enabling precise assembly of complex peptides. Commonly used in pharmaceutical research and drug development. Protecting groups are orthogonally removable: Z by hydrogenation or TFA, OBzl by hydrogenolysis.